chemical engineering chemical process MCQs – Page 6

Practise multiple-choice questions from chemical engineering chemical process for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical process Mcqs
101. The yield of tar from high temperature carbonisation of dry coal is about _______________ percent?
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A. 12

B. 0.3

C. 3

D. 22

102. ____________________ of rubber decreases after its vulcanisation?
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A. Tensile strength

B. Resistance to the action of organic solvent

C. Maximum service temperature

D. Tackiness
103. The purpose of tanning in leather industry is to____________________?
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A. Impart water resistance

B. Smoothen the leather

C. Stiffen the leather

D. Make it flexible

104. Glaubers salt is chemically ?
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A. Potassium sulphate

B. None of these

C. Calcium sulphate

D. Potassium chlorate

105. Solvent extracted oil________________?
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A. Has low free fatty acid content

B. Is odourless

C. None of these

D. Has more of unsaturates

106. Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its________________?
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A. Hydrolysis tendency in presence of water

B. Poor oxidation stability and high gum forming tendency

C. Greater tendency of decomposition at elevated temperature

D. All A, B. and C
107. Commercial production of Vanaspati is done by _______________ of edible vegetable oils ?
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A. Hydrogenation

B. Hydrocracking

C. Hydrolysis

D. Oxidation

108. Which of the following is not a pyrite ore ?
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A. Celestite

B. Gypsum

C. Galena

D. Siderite
109. ______________ is a thermosetting plastic?
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A. Polythene

B. Bakelite

C. Polyvinyl chloride

D. Teflon

110. The major use of butadiene is____________________?
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A. As a plasticiser for unsaturated polyester

B. As an anti-skinning agent in paint

C. In the manufacture of synthetic rubber

D. None of these

111. Which is a high grade pulp ?
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A. Sulphite pulp

B. Sulphate pulp

C. Mechanical pulp

D. Rag pulp

112. Fluorescent dyes are added in detergents to__________________?
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A. None of these

B. Act as tarnish inhibitor for metals like German silver

C. Attain distinctiveness from other brands

D. teness appearance of white fabrics</strong>

E. Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the
113. Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because__________________?
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A. All A, B. and C.

B. Tar neutralises the residual acids present in pitch

C. Its calorific value is very less

D. ssure drop</strong>

E. It reduces viscosity and imparts fluidity for its transportation through pipelines at economic
114. Fat dispersed in water is exemplified by__________________?
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A. Colloids

B. Emulsion

C. Butter

D. Gel

115. Nitro-glycerine absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as controlled explosive called dynamite. The raw material used for its manufacture are glycerine, nitric acid and___________________?
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A. Phosphoric acid

B. Hydrochloric acid

C. Sulphuric acid

D. Hydrofluoric acid

116. Nylon-66 is so named because the____________________?
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A. Number of nitrogen atoms between two carbon atoms are 6

B. Number of carbon atoms between two nitrogen atoms are 6

C. Polymer was first synthesised in 1966

D. Average degree of polymerisation of the polymer is 1966
117. CaCl(OCl) is the chemical formula of___________________?
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A. Bleaching powder

B. Aqua regia

C. Hypo

D. Plaster of Paris

118. Laboratory glass wares which reacts with hydrofluoric acid, are made of the ______________ glass?
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A. Soda lime

B. Lead

C. Alkali silicate

D. Borosilicate
119. Chemical formula of salt cake is____________________?
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A. Na2SO4

B. BaSO4

C. CaSO4

D. MgSO4

120. Fish contains about _______________ percent oil ?
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A. 20

B. 35

C. 5

D. 10